From patchwork Fri Oct 13 15:56:37 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Howells X-Patchwork-Id: 13421089 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id C5B89CDB47E for ; Fri, 13 Oct 2023 16:00:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232779AbjJMQAC (ORCPT ); Fri, 13 Oct 2023 12:00:02 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60622 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232795AbjJMP7r (ORCPT ); Fri, 13 Oct 2023 11:59:47 -0400 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B2938FF for ; Fri, 13 Oct 2023 08:57:57 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1697212676; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=gcj4568/Cja75cJgRJVpO1Pa05t3rY5GzidcrAxRiJc=; b=ClXdZA06t0LPu3bjMvmBN7lvq9onoyvmzPfv+kz2ojWj4MguAmFNirC0+9iyKc8QcsrwxB XGr69BU9eDhhfEWDWrbftU3E2udBejZ+VXkMZV2zV5u3smN37sTTtjGmq6Psp1Ndvm2Ayz T8FgtTAw6c3Qm7D5byWw3k33xP4dGYc= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-614-pbz5bDgbMkSmeASAhSIaXA-1; Fri, 13 Oct 2023 11:57:46 -0400 X-MC-Unique: pbz5bDgbMkSmeASAhSIaXA-1 Received: from smtp.corp.redhat.com (int-mx09.intmail.prod.int.rdu2.redhat.com [10.11.54.9]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 9EB33862F29; Fri, 13 Oct 2023 15:57:45 +0000 (UTC) Received: from warthog.procyon.org.uk (unknown [10.42.28.226]) by smtp.corp.redhat.com (Postfix) with ESMTP id 0621C492BD9; Fri, 13 Oct 2023 15:57:42 +0000 (UTC) From: David Howells To: Jeff Layton , Steve French Cc: David Howells , Matthew Wilcox , Marc Dionne , Paulo Alcantara , Ronnie Sahlberg , Shyam Prasad N , Tom Talpey , Dominique Martinet , Ilya Dryomov , Christian Brauner , linux-afs@lists.infradead.org, linux-cifs@vger.kernel.org, linux-nfs@vger.kernel.org, ceph-devel@vger.kernel.org, v9fs@lists.linux.dev, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, linux-cachefs@redhat.com Subject: [RFC PATCH 04/53] netfs: Allow the netfs to make the io (sub)request alloc larger Date: Fri, 13 Oct 2023 16:56:37 +0100 Message-ID: <20231013155727.2217781-5-dhowells@redhat.com> In-Reply-To: <20231013155727.2217781-1-dhowells@redhat.com> References: <20231013155727.2217781-1-dhowells@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.4.1 on 10.11.54.9 Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org Allow the network filesystem to specify extra space to be allocated on the end of the io (sub)request. This allows cifs, for example, to use this space rather than allocating its own cifs_readdata struct. Signed-off-by: David Howells cc: Jeff Layton cc: linux-cachefs@redhat.com cc: linux-fsdevel@vger.kernel.org cc: linux-mm@kvack.org --- fs/netfs/objects.c | 7 +++++-- include/linux/netfs.h | 2 ++ 2 files changed, 7 insertions(+), 2 deletions(-) diff --git a/fs/netfs/objects.c b/fs/netfs/objects.c index e41f9fc9bdd2..2f1865ff7cce 100644 --- a/fs/netfs/objects.c +++ b/fs/netfs/objects.c @@ -22,7 +22,8 @@ struct netfs_io_request *netfs_alloc_request(struct address_space *mapping, struct netfs_io_request *rreq; int ret; - rreq = kzalloc(sizeof(struct netfs_io_request), GFP_KERNEL); + rreq = kzalloc(ctx->ops->io_request_size ?: sizeof(struct netfs_io_request), + GFP_KERNEL); if (!rreq) return ERR_PTR(-ENOMEM); @@ -116,7 +117,9 @@ struct netfs_io_subrequest *netfs_alloc_subrequest(struct netfs_io_request *rreq { struct netfs_io_subrequest *subreq; - subreq = kzalloc(sizeof(struct netfs_io_subrequest), GFP_KERNEL); + subreq = kzalloc(rreq->netfs_ops->io_subrequest_size ?: + sizeof(struct netfs_io_subrequest), + GFP_KERNEL); if (subreq) { INIT_LIST_HEAD(&subreq->rreq_link); refcount_set(&subreq->ref, 2); diff --git a/include/linux/netfs.h b/include/linux/netfs.h index b92e982ac4a0..6942b8cf03dc 100644 --- a/include/linux/netfs.h +++ b/include/linux/netfs.h @@ -214,6 +214,8 @@ struct netfs_io_request { * Operations the network filesystem can/must provide to the helpers. */ struct netfs_request_ops { + unsigned int io_request_size; /* Alloc size for netfs_io_request struct */ + unsigned int io_subrequest_size; /* Alloc size for netfs_io_subrequest struct */ int (*init_request)(struct netfs_io_request *rreq, struct file *file); void (*free_request)(struct netfs_io_request *rreq); int (*begin_cache_operation)(struct netfs_io_request *rreq);